由一对延时飞秒激光脉冲引起的水膜X射线发射的动态位置偏移。

Dynamic position shifts of X-ray emission from a water film induced by a pair of time-delayed femtosecond laser pulses.

作者信息

Hsu Wei-Hung, Masim Frances Camille P, Balčytis Armandas, Juodkazis Saulius, Hatanaka Koji

出版信息

Opt Express. 2017 Oct 2;25(20):24109-24118. doi: 10.1364/OE.25.024109.

DOI:10.1364/OE.25.024109

Abstract

Femtosecond double-pulsed laser excitation of a water film in air showed enhancements of X-ray intensity as compared with single pulse irradiation. The position of the highest yield of X-rays strongly depends on temporal separation between the pre-pulse and the main-pulse (energy ratios where ∼ 1 : 10). The strongest X-ray emission was observed at 10-15 ns delay of the main-pulse. Nanoscale roughening of water surface can account for the observation.

摘要

与单脉冲照射相比，飞秒双脉冲激光对空气中水膜的激发显示出X射线强度的增强。X射线最高产额的位置强烈依赖于预脉冲和主脉冲之间的时间间隔（能量比约为1:10）。在主脉冲延迟10 - 15纳秒时观察到最强的X射线发射。水表面的纳米级粗糙度可以解释这一观测结果。